I can't see why that spot would be a problem. Obviously made for it by the factory. Are you thinking that the dipstick will hit the "girdle"? Doesn't look like it in the pic, but perspective is everything.

Ya, no electric PS in the 90s at least in Nissans anyway. (Edit: apparently there was some in the 80s with micro cars JDM only(Suzuki, Mitsubishi) and the 90s with the NSX worldwide.)
Can't say I have. I have a buddy with a V8 510, no PS in his car.
That being said, your explanation makes complete sense especially for an enduro car.
Anything you can do to reduce driver fatigue as long as it doesn't come with too much of a weight penalty.
I appreciate you taking the time to explain your thought process and look forward to seeing how it turns out.
Brock

Project is coming along quite nicely.
I do have one question though. No hate, just a question.
Why do you feel the need to have power steering?
I have been driving 510s for 30 years. All sorts of power levels and engine configurations and tire widths, but never felt the need for power steering.
I remember when everyone was loading their cars with stereos or putting all sorts of electrical doodads in their cars (power locks, windows ..) The 90s 🙄
But I don't remember anyone pining for power steering. Just an observation from an old guy.
Love the car though. 😁

I vote VH45DE or VK45 or 56DE... This is a Nissan/Datsun site after all. 😁 BTW I also am old (class of 86) and love Datsuns, AE86s and Starions. Have Datsuns and Toyotas, but no Mitsubishi yet. Although my brother had a Sapporo. I loved that car.

My opinion? Unboosted 280ZX BMC in the 510 is just too stiff. I think you'll find the same in the 710. If it has a booster reuse it if you can. Boosted brakes are much easier on the leg especially at our advanced age. ? And I find them easier to modulate without breaking the seatback.